Latch



Oct. 16, 1928.

B. GIRAGOSIAN LATCH Filed Jan. s, 1928 Patented Oct. i6, 1928.

i .STATES BEDROS IGIRAGSIIYIAN, F WATERTOWN, ,MASSACHUSETTS- LATCH.

Application len January 3, 1928. Serial No. 244,201.

This invention relates to a latch Vmechanism for doors and the like and has for its' E0 for a latch mechanism already installed upon a door or like support.

Another object is to provide a latch which may be readilyl incorporated into an artistic design wherein the handle or grip of th'e I door may be combined with the latch.

A further object is to provide a latch mechanism which may be operated with a very slight pressure of the thumb or finger without interfering with a firm grip on the handle, thus facilitating the opening of the door.

Another object of the invention is to provide a latch mechanism which is designed to minimize the possibility of wear upon the parts and a consequent maladjustment resulting therefrom.

Other objects and features of the invention will be more particularly pointed in-the following description in connection with the accompanying drawings and will be particu-` larly pointed out in the claims.

The latch mechanism forming' the subject matter of the present invention may be applied toa door or support of like character.

45 rlthe drawings illustrate the latch as combined with a handle or door pull constituting a unit which Iis a very efficient adaptation of the device, but I do not wish to be confined to this particular construction. The latch 'W may be entirely separate from other fixtures on the door.

The present device is designed to supplant the rotating knob mechanism which is commonly used to actuate the latch upon a door. Additional locking means may be, and desirably is, incorporated into the design ,of the device but forms no part of the invention. Owing to the special construction of. thedevice, a number o types of design may be followed in the manufacture of this Vldevice. For instance, the grip or door pull maybe installed upon thev door as a separate unit, while the push button may belo'catedat any point that is readily accessible to thethumb or fingers of the hand. The external ele,

suitable material such as glass, metal or the like. The material used may be adapted to the conditions in which the device is used. For instance, a non-corrosive metal may be used for outdoor installations and colored glass or other colored material may be used for indoor installations. In the latter case they may well have a color to blend with the color scheme of a room.'

ln the drawings: Fig. 1 is anillustration of the device applied to a door.

Fig. 2 is a view mainly in cross section showing a part of the handle in elevation.

Fig. 3 is a vertical transverse cross section on line 3er-3 of Fig. 2.

Fig. 4 is a fragmentary detail view showying the method of securing a portion of the mechanism to the door.

A particular embodiment of the invention is illustrated in the drawings. A door 1 has formed therein a rectangular recess 2 into which-is fitted a housing 3 containing mechanism by which the latch is actuated. A

Vhandle or grip member 4 is xed to the ldoor preferably on either side thereof in any suitable manner, as by'screws 5. `Each handle member has a transverse aperture 6 therein lwinch receives a push button 7. Adjacent to and communicating with the aperture 2 is another aperture 8 in which the bell crank Vlevers 9 and 10 may be swun about their respective pivots 11 and 12. T e pivots `11 and 12 may conveniently be formed in sheet metal plates 13 and 14 which are secured to the face of the door in any suitable way, such as b striking up points from the lplate, whic points are driven into the door. One arm of the levers 9 and 10 is engaged by the push buttons 7. The other arms thereof engage a slidel 15 which is guided in ways 16 of the housing 3. The slide 15 has a'shoulder 17 formed thereon against which rests one arm of a bell crank lever 18 pivoted at 19.

' A latch 20 is guided at one endin the front late 21 of the housing 3 and at its other end y a bifurcated post 22 fixed in the housing 3;'

The inner end of the latch has a reduced shank 23A which has a head 24 thereon. A

helical compression 4spring 25 surrounds the shank 23 and has a bearing at one end against the large head 26 of the latch and at its other end upon the post 22,- The bell crank lever 18 has an arm 27 thereon which normally is held between the head 24 ofthe latch and the ments of thevdevice may be made of any wpost22 by the action of the lspring 25. The

tension of the spring 25 also maintains the latch 20 normally in the usual recess 28 of the. door-j amb, thereby securing the door in closed position. An additional bolt or night lock 29 may be built into the casing 3, but forms no part of the present invention.

If it is desired to install this device upon a door already having a latch mechanism of any of the usual'types, it is a very simple matter to effect a change. After removing the old latch mechanism, the housing 3 of my de vice may be inserted in the sameaperture and in some cases it may not be necessary to cut any further apertures in the door. In any event, the'aperture 8 may be readily cut to receive the levers 9 and 10. The plates 13 and 14 carrying the respective pivots 11 and 12 of the levers 9 and 10 are driven into either face of the door in their proper position ad] acent to the slide 15. The handle members '4 are then secured in position over the platesl and'14 so that the levers 9 and 10 Will be` in proper relative position to the push buttons 7- to be engaged thereby.

To operate the device, it is merely necessary to grasp the handle and exert a slight pressure upon the push buttons with either the thumb or linger which releases the latch, yenabling the door to be opened. Upon releasing the pressure on the push button, the spring 25 will restore the latch to its normal extended position ready to latch thel door when'it is again closed.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is: y

1. A latch mechanism adapted to be mounted on a dooror like support comprising a push button havingmotion transverse to the plane of the support, a lever pivoted upon the support engaged at one end by said push button, a slide mounted in the support and capable of line-ar motion therein at right angles to the motion of said push button and engaged by the .other end of the lever, a shoulder on said slide, a latch having a head on its inner end, a latch actuating lever pivoted upon the support engaged at one end by said shoulder and engaging the latch head at its' other end, a guideway rigid with the support adapted `to ide the latch and a spring tending norma ly t'o pro'ect the latch.

2. A latc mechanism adapted to be mounted upon a door or like support and associated `with a handle grip comprising a push button having motion transverse to the plane of said support, a bell crank lever pivoted upon the support engaged at one end by said push button and engaging at its other end a slide, a housing in which the slide is guided, a latch, a latch actuating lever pivoted Within the housing engaged at one end by said slide and at its other end engaging said latch to Withdraw the same upon actuation of the push button and automatic means tending normally to extend the latch.

3. A latch mechanism adapted -to be mounted upon a door or other support and associated With a handle grip comprising a push button extending from either side of the support and having motion transverse to the plane thereof, bell crank levers pivoted upon the support'engaged at one end by said push buttons and engaging at their other ends a Ysingle slide having a shoulder thereon, a housing in which the slide is guided, a latch, a latch-actuating lever pivoted Within the housing engaged at one end by said shoulder and at its other end engaging the inner end of the latch to Withdraw the same upan actuation of the push button and a spring tending normally to extend the latch.

4. A latch mechanism adapted to be mounted upon a door or.like support and associated with a handle grip comprising a push button extending from eitherv side of the4 support and having motion transverse to the plane thereof, bell crank levers pivoted upon the support engaged at one end by said push buttons and engaging at theirv other ends a single slide having a shoulder thereon, a hous- 'ing in which the slide is guided, a latch-actu ated lever pivoted Within the housing, a latch member within said housing having a stem, a guideway rigid with the housing adapted to guide the stem at a .point intermediate of its length, a head onthe outer end of the stem to engage a door frame or like structure, a i

name to this specification.

BEDROS GIRAGOSIAN.

vIn testimony whereof, I have signed my` 

